Symptoms

A JavaScript void 0 indicates that an error has occurred in an Internet browser due to the pop up blocker. This is a program intended to prevent unwanted advertisements popping up while you’re browsing the Internet.

Resolution

There are many possible solutions to this problem, here are some of them.

Firstly, this can be caused by being behind a proxy server. The most likely explanation for this would be using a shared computer, and if you don’t have administrative there is nothing you can do about it.

Secondly, ensure that Java is running effectively on your machine. This process differs slightly depending on which browser you are using. For Internet Explorer, firstly, click ‘Tools’ and then ‘Internet Options’, and then select the ‘Security’ tab, and the ‘Custom Level’ button.

Next scroll down to ‘Scripting of Java applets’, and ensure that the ‘Enable radio button’ is selected, before selecting OK to approve your preference.

For Mozilla Firefox go to Tools > Options and click on the ‘Content’ tab. Ensure that the ‘Enable JavaScript check-box’ is checked, and then click OK.

For Google Chrome click the icon in the top-right corner of Chrome which is shaped like a gear, and then select ‘Settings’. Next select the option ‘Show advanced settings’, and under the ‘Privacy’ section, click ‘Content Settings’.

Next select the ‘Allow all sites to run JavaScript (recommended)’ button which is located under JavaScript, and finally click OK.

For Opera, firstly click the Opera drop-down menu which is located in the top-left corner of the Opera browser. Next select Settings > Preferences, or if you’d prefer to use a shortcut then you can also press CTRL + F12 simultaneously to bring up the Preferences screen.

Next click the ‘Advanced’ tab, and then select ‘Content’ from the menu which is located on the left-hand side of the screen. And the last step is to ensure that the ‘Enable JavaScript check-box’ is checked.

To enable JavaScript in Apple’s Safari, click the icon in the top-right corner of the Safari browser which is shaped like a gear, before selecting ‘Preferences’. Next click the ‘Security’ tab, and check the ‘Enable JavaScript check-box’ if it is currently unselected. A popup will then notify you that you have enabled Javascript.

This should solve any problems with Javascript void errors, but if you still experience problems after its done you could try either using a different browser or reinstalling your existing browser.